Finding the Fourth Proportional to 1,057.89, 1,585.76 and 749.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.89 : 1,585.76 = 749.01 : x
2. Step 2: Convert to fraction form
   1,057.89/1,585.76 = 749.01/x
3. Step 3: Cross multiply
   1,057.89x = 1,585.76 × 749.01
4. Step 4: Simplify right side
   1,057.89x = 1,187,756.51
5. Step 5: Solve for x
   x = 1,187,756.51/1,057.89
6. Step 6: Final answer
   x = 1,122.76